export function formatUTC(utc_datetime) {
    // 转为正常的时间格式 年-月-日 时:分:秒
    var T_pos = utc_datetime.indexOf('T');
    var Z_pos = utc_datetime.indexOf('Z');
    var year_month_day = utc_datetime.substr(0,T_pos);
    var hour_minute_second = utc_datetime.substr(T_pos+1,Z_pos-T_pos-1);
    var new_datetime = year_month_day+" "+hour_minute_second; // 2017-03-31 08:02:06

    // 处理成为时间戳  ios new Date(Date.parse(new_datetime))报错
    //timestamp = new Date(Date.parse(new_datetime));
    var arr = new_datetime.split(/[-:/\s]/);  //字符串分割返回一个数组

    var date = new Date(arr[0], arr[1]-1, arr[2], arr[3], arr[4], arr[5]);

    timestamp = date.getTime();
    timestamp = timestamp/1000;

    // 增加8个小时，北京时间比utc时间多八个时区
    var timestamp = timestamp + 8*60*60;

    // 时间戳转为时间 12小时制
    var beijing_datetime = new Date(parseInt(timestamp) * 1000).toLocaleString().replace(/年|月/g, "-").replace(/日/g, " ");
    //return beijing_datetime;

    //24小时制
    var datetime = DateFormat('Y-m-d H:i:s',timestamp);
    return datetime;
}


/**
 * 和PHP一样的时间戳格式化函数
 * @param {string} format 格式
 * @param {int} timestamp 要格式化的时间 默认为当前时间
 * @return {string}   格式化的时间字符串
 */
function DateFormat(format, timestamp){
    var a, jsdate=((timestamp) ? new Date(timestamp*1000) : new Date());
    var pad = function(n, c){
        if((n = n + "").length < c){
            return new Array(++c - n.length).join("0") + n;
        } else {
            return n;
        }
    };
    var txt_weekdays = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
    var txt_ordin = {1:"st", 2:"nd", 3:"rd", 21:"st", 22:"nd", 23:"rd", 31:"st"};
    var txt_months = ["", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
    var f = {
        // Day
        d: function(){return pad(f.j(), 2)},
        D: function(){return f.l().substr(0,3)},
        j: function(){return jsdate.getDate()},
        l: function(){return txt_weekdays[f.w()]},
        N: function(){return f.w() + 1},
        S: function(){return txt_ordin[f.j()] ? txt_ordin[f.j()] : 'th'},
        w: function(){return jsdate.getDay()},
        z: function(){return (jsdate - new Date(jsdate.getFullYear() + "/1/1")) / 864e5 >> 0},

        // Week
        W: function(){
            var a = f.z(), b = 364 + f.L() - a;
            var nd2, nd = (new Date(jsdate.getFullYear() + "/1/1").getDay() || 7) - 1;
            if(b <= 2 && ((jsdate.getDay() || 7) - 1) <= 2 - b){
                return 1;
            } else{
                if(a <= 2 && nd >= 4 && a >= (6 - nd)){
                    nd2 = new Date(jsdate.getFullYear() - 1 + "/12/31");
                    return DateFormat("W", Math.round(nd2.getTime()/1000));
                } else{
                    return (1 + (nd <= 3 ? ((a + nd) / 7) : (a - (7 - nd)) / 7) >> 0);
                }
            }
        },

        // Month
        F: function(){return txt_months[f.n()]},
        m: function(){return pad(f.n(), 2)},
        M: function(){return f.F().substr(0,3)},
        n: function(){return jsdate.getMonth() + 1},
        t: function(){
            var n;
            if( (n = jsdate.getMonth() + 1) == 2 ){
                return 28 + f.L();
            } else{
                if( n & 1 && n < 8 || !(n & 1) && n > 7 ){
                    return 31;
                } else{
                    return 30;
                }
            }
        },

        // Year
        L: function(){var y = f.Y();return (!(y & 3) && (y % 1e2 || !(y % 4e2))) ? 1 : 0},
        //o not supported yet
        Y: function(){return jsdate.getFullYear()},
        y: function(){return (jsdate.getFullYear() + "").slice(2)},

        // Time
        a: function(){return jsdate.getHours() > 11 ? "pm" : "am"},
        A: function(){return f.a().toUpperCase()},
        B: function(){
            // peter paul koch:
            var off = (jsdate.getTimezoneOffset() + 60)*60;
            var theSeconds = (jsdate.getHours() * 3600) + (jsdate.getMinutes() * 60) + jsdate.getSeconds() + off;
            var beat = Math.floor(theSeconds/86.4);
            if (beat > 1000) beat -= 1000;
            if (beat < 0) beat += 1000;
            if ((String(beat)).length == 1) beat = "00"+beat;
            if ((String(beat)).length == 2) beat = "0"+beat;
            return beat;
        },
        g: function(){return jsdate.getHours() % 12 || 12},
        G: function(){return jsdate.getHours()},
        h: function(){return pad(f.g(), 2)},
        H: function(){return pad(jsdate.getHours(), 2)},
        i: function(){return pad(jsdate.getMinutes(), 2)},
        s: function(){return pad(jsdate.getSeconds(), 2)},
        //u not supported yet

        // Timezone
        //e not supported yet
        //I not supported yet
        O: function(){
            var t = pad(Math.abs(jsdate.getTimezoneOffset()/60*100), 4);
            if (jsdate.getTimezoneOffset() > 0) t = "-" + t; else t = "+" + t;
            return t;
        },
        P: function(){var O = f.O();return (O.substr(0, 3) + ":" + O.substr(3, 2))},
        //T not supported yet
        //Z not supported yet

        // Full Date/Time
        c: function(){return f.Y() + "-" + f.m() + "-" + f.d() + "T" + f.h() + ":" + f.i() + ":" + f.s() + f.P()},
        //r not supported yet
        U: function(){return Math.round(jsdate.getTime()/1000)}
    };

    return format.replace(/([a-zA-Z])/g, function(t, s){
        if( t!=s ){
            // escaped
            var ret = s;
        } else if( f[s] ){
            // a date function exists
            ret = f[s]();
        } else{
            // nothing special
            ret = s;
        }
        return ret;
    });
}

export function priceFormat(price){
    price = price.toString().replace(',','');
    var x = Number(price);
    var f = parseFloat(x);
    if (isNaN(f)) {
        return false;
    }
    f = Math.round(x*100)/100;
    var s = f.toString();
    var rs = s.indexOf('.');
    if (rs < 0) {
        rs = s.length;
        s += '.';
    }
    while (s.length <= rs + 2) {
        s += '0';
    }
    return s;
}

export function systemInfo() {
    var userAgent=navigator.userAgent;
    var isAndroid = userAgent.indexOf('Android') > -1 || userAgent.indexOf('Adr') > -1;
    var isiOS = !!userAgent.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);
    if (isAndroid){
        return 'android'
    }else if (isiOS){
        return 'ios'
    }else {
        return 'none'
    }
}